Pneumatic brush.



I. CHAIMOVITSCH.

PNEUMATIC BRUSH.

APPLICATION FILED SEPT. 1, 1911.

1,076,549. Patented Oct. 21, 1913.

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A TTORNE v3 I. OHAIMOVITSGH.

PNEUMATIC BRUSH.

APPLICATION FILED SEPT. 1, 1911.

Patented Oct. 21, 1913.

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UNITED sTA'r s ra ENT oFFIoE.

ISAAC CHAIMOVITSCH, OF GHICAGO, ILLINOIS.

PNEUMATIC BRUSH.

cleaning brush capable of being grasped in the hand of a user, having no power supplying devices externally connected therewith,'which is capable of sucking up the dirt which it gathers into a storage receptacle within itself.

The object of the invention is to provide such a brush of compact form, which can be easily and cheaply made, which is eflicient and otherwise satisfactory in operation, and not readily liable to get out of order.

The invention broadly consists in a brush having bristles or their equivalent attached to a handle of ordinary external form adapted to .be grasped by the user, the handle itself containing a dust pumping and storage mechanism and a motor for operating said Inechanism The invention more in detail consists in features which will be hereafter more fully described and claimed as the specification proceeds.

ln-the drawings, Figure 1 is a sectional side view of mechanism illustrating the preferred form of this invention. Fig. 2 is a plan view taken on the irregular line 2--2 of Fig. 1. Fig. 3 is a vertical sectional detail view on the line 3-3 of Fig. 2. Fig. 4 is a vertical sectional detail view on the line 4 4 of Fig. 2. Fig. 5 is a perspective detail view of a supportin frame for use within the dirt gathering ag. Fig. 6 is a detail view of the ock for the cover which incloses the dirt chambers.

A ain referring to the drawings, in whicfii similar numerals indicate the same parts throughout the several views, attention is called to the-brush back 10 having bristles 12 attached thereto in any of the well known methods. the back being provided with airports r passageways 14 arranged at such intervals with reference to thebristles and made of such size or sizes and she s as may appear most satisfactory. ese passageways 14 may, if de- Spccification of Letters Patent.

Application filed September 1, 1911.

Patented Oct. 21, 1913.

Serial No. 647,237.

sired, be closed by valves 8 of leather or suitable material so mounted that air may pass up through the passages 14 and can not return.

Running along the lower edge of the base 10 is a flange 16. Fitted over this flange 16 is an L sh ed metallic cover 18 forming between it an; the back 10 a passageway 20 provided with a discharge opening .22 so that dust drawn up from the brush proper through the opening 14 passes through this passageway 20 and out of the discharge opening 22. Concentric with the cover 18 heretofore referred to is the outer case or cover 24 of the brush fitting down into engagement with the flanges 16. This cover may be of any suitable size and shape so long as it is suificiently large to contain all of the mechanism here shown, and to be described, and is yet sufliciently small so that the operator may conveniently take hold of it. Within the casing 24 just described and in approximately the longitudinal center of the brush is located a motor which in the particular case here illustrated takes the form of a sort of clock mechanism. Any other form of motor capable of doing the work required may be substituted without departing from the invention. This device is supported by vertical plates 30 connected together by a base plate 32. Journaled in these two plates 30 are four shortsha fts 34, each provided at one end with a toothed gear 36 meshing into a common gear 38 ournaled on a shaft 40, the latter journaled in any suitable manner, in the particular case here illustrated in the left hand plate 30 and in a plate 42 (see Fig. 3). Each shaft 34 is provided with a ratchet wheel 44 engaged by a ratchet dog 46 in the ordinary manner. Each shaft 34 is driven by a spring device 48 which, in the particular case here illustrated, consists of six separate springs side by side. (See Figs. 2 and 3.) The ends 50 of the shafts 34 are adapted to be engaged by keys for the purpose of w'inding'in the ordinary manner in which a watch or clock is wound. As there is nothing patentable in this feature the Winding devices are not shown in detail.

At one side of gear 38 heretofore referred to is a stud 52 carrying a pinion 54 rigidly Secured to a gear- 56 meshing with a pinion 58 loosely journaled upon shaft 40. This pinion 58 is rigid with a gear 60 which in wheel 74, thus controlling the speed of the turn meshes with another pinion (i2 loosely journaled on stud Q32. Rigid with .gear- '62 is a gear 64 meshing with a piniOn. 66

motor. Also mounted upon the shaft at any suitable point is a governor 84' forpre venting the shaft and attached mechanism running too rapidly. As this device is well known in the art 'and not claimed itis not shown in detail. 'Pif 'mted at 86 on a-lug 88 within the cover iaa latch or lock lever 90 having its end 92 adapted to engage'the gear teeth oii'one of. the wheels 36, heretofore described. I .This lever is normally held in such locked position by a spring 94 and may he released by pressing the lever handle 96 extending outside the cover to a position in which the end 92 of the lever clears the gear 36.

Each one of the bevel pinions heretofore referred to is mounted upon a short-shaft 98 which carries at its oppositeend a circular disk 100. Eccentrically mounted upon each one of these disks 100 is a crank pin 102 entering a link 104, whose opposite end is connected at 106 to a vertical lever 108 rigidly secured atits base upon a shaft 110 running lengthwise of the brush. It will be obvious, without detailed explanation,

that when the springs 48 are wound up and allowed to propel the four shafts 34 they, through the gearing described, rotate shafts 98, with the result that links 104 and levers 108 are oscillated. Each lever 108 is parallelto and connected with another lever 108 mounted on the other end of shaft 110.

In the upper end of each lever 108 and 108 is an elongated slot 112 entered by a pin 114 carried by a bracket 116 upon the face plate 118 of one of the pairs of bellows, which will now be described. As the bellows device carried by these arms is flexible this slot is wholly immaterial and an ordinary pin connection may be used. Each one of the discharge openings 22, in the particular case here illustrated numbering two, enters one of the suction bellows just referred to, which are designed to forcibly draw air through the brush proper and the passageway 20. Each bellows consists of a front plate 118, a rear plate 120. and collapsible bottom, side and top bellows members 122 of ordinary construction. The front and rear plates are connected together by a lever 124 pivoted to the "rear plate at 126 and to the front plate at"-1 28, and-as; the bellows collapse this lever 124; rotatesaboutpivot 126. The top section of the bellows member 122 may be opened for the purpose of removing the dirt sucked therefrom and closed again by means of any suitable device, such for instance as that of Fig. 6, made up of parts 130, 134, and 136. not here claimed.

Inside of eachbellows just described is placed. a dirt or dustsack 140 of sufficient size and shape so that when the bellows are extended to the full line position shown at the right hand half of Fig. 2 this sack will be, fully distended. These sacks are open only at one point, that corresponding with discharge openings 22 heretofore described and are provided on their insides with a flap 142 adapted to normally close said opening 122, as clearly appears in Fig. 4. When the operator loosens the fastening of Fig. 6 and lifts the upper port-ion of the bellows and takes out the dirt sack this flap 142 falls down into contact with the side of the sack and closes the opening during the operation of lifting the sack and contained dirt out of the. device. The sack of dirt maybe emptied, cleaned and reinserted in the device but in actual practice it is usual to throw away the sack with the dirt therein and place a new sack in the machine.

The discharge opening 22 is provided with a suction valve, being a piece ofleather or like material 144 secured at 146 upon the upper edge of each discharge opening 22 and extending over the end of said opening. Whenever the bellows are extended to draw air through passageway 20 and opening 22, this valve 144 swings to the left, as shown in dotted lines in Fig. 4, and lets the air and accumulated dirt into the dirt ,sack and bellows. When the bellows moves in the opposite direction this valve 144 swings to the position shown in Fig.4, closing passageway 22 and preventing the return of dirt through passageways 22, 20 and 14. As shown, the flap 142 normally lies over and in contact with this valve 144 when the. dirt. sack is in position within the bellows.

In the device here illustrated one bellows is provided at each end of the brush and the eccentrics 102 are so located with reference to each other that one bellows is opening while the other is closing, thus making a practically continuous suction through the brush proper. V

In order to keep the dirt sack in extended position within the bellows so that dirt may enter it as freely as possible-the device illustrated in Fig. 5 is provided comprising a rigid plate 150 having through it an opening 152 adapted to fit over the inner endof discharge pipe 22, the plate 150 lying in close contact with the inner side of the bellows. Pivoted upon this plate 150 at its top are two arms 154 connected at their ends to a common rod 156. Pivotally mounted at the bottom of plate 150 are two other arms 158 connected at their top to a common rod 160. The rods 156 and 160 are connected together by retractile springs 162 so that they tend to normally hold all of the parts as shown in Fig. 5. When this device is inserted within either bellows that bellows is compressed, the springs 162 are stretched, with the result that when the bellows are released these springs 162 tend to return the parts to the position of Fig. 5, thus extending the dirt sack.

In the complete operation of the device, the springs of the propelling motor are first wound up; the operator presses handle 94, thus releasing the latch and starting the motor. He now rotates thumb screw 80 until he has slowed down the motor to the speed which is satisfactory to him and is ready to use the brush in the ordinary manner in which any hand brush isused, rubbing the bristles 12 over. the object to be brushed. The clock device or motor ropels the bellows in the manner descri ed,

thereby producing a practically continuous suction through the brush bristles and thus draws the dirt stirred up by the bristles first into one bellows and its sack and then .into the other bellows and its dust sack. The bellows are of some perforate cloth like cheese cloth and the air which is umped through the brush passes through this material and out into the open air, all the dirt carried with it being retained by the dirt sack. The outer casing 24 is provided with perforations or windows 170, so that the air can escape therefrom.

Within limits the device will pick up dirt without any rubbing action, althou h it will not work as well as when the dirt 1s stirred up by brushing in the usual way.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is 1. A device of the class described, comprising a perforated brush and cover therefor, adapted to be grasped by the hand of the user and being externally wholly unconnected with any other mechanism, a suction pumping mechanism inside said device at each end thereof, a motor between said suction devices and connecting means between the suction devices and the motor so arranged that the motor operates the suction devlces alternatel for the purposes set forth.

2. A device 0 the class described, comprisin a perforated brush and cover therefor, a apted to. be grasped by the hand of the user and being externally wholly unconnected with any other mechanism, a spring driven motor inclosed within the cover, two bellows operatively connected to said motor so as to be alternately operated by it and so connected to the brush that when operated they draw dirt practically continuously from the brush into said cover, and filtering means adapted to retain dirt drawn in by the bellows within the cover, for the purposes set V forth.

3. A device of the class described comprising a perforated brush, a cover adapted to be grasped by the hand of the user, suction pumping mechanism at each end of the brush, a motor device mounted within the cover between said suction devices and adapted to alternately operate said suction devices, whereby practically; a continuous suction through the brush is provided, and means for temporarily retaining within the brush cover dirt sucked up by said suction devices.

In witness whereof, I have hereunto sub scribed my name in the presence of two witnesses.

ISAAC CHAIMOV'ITSGH.

Witnesses:

DWIGHT B. Cmmvnn, -:Max S. Rosnxzwmc.

copies of this patent may be obtained (or he cents each, by addressing the commissioner of ratentl. Waehlagt on, D. 0. 

